Patent US4232181A successfully refreshed from Google Patents.
US4232181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroisomerization of pentane utilizing Pd exchanged mordenite
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1979-06-28
•
Granted: 1980-11-04
•
Expires: 1999-06-28
Abstract
Abstract Ammonia exchanged large port mordenite, which is subsequently mildly acid leached, and calcined, in which at least 95% of the exchangeable sodium has been removed and having from 0.38 to 0.8 milliequivalents of acid sites at least as strong as 48% sulfuric acid per gram (as measured by titration with butylamine, and employing dicinnamalacetone indicator) has been found to be highly active hydrocarbon isomerization catalyst. Incorporation of noble metal, e.g. palladium, on the catalyst improves the selectivity for isomerization of normal pentane to isopentane for highly active catalysts at high conversion rates.
Inventors
- 👤 Joseph R. Kiovsky
- 👤 William J. Goyette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:43
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/18; B01J29/20; B01J29/22; C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2767; C07C5/277; C07C5/2791
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A method of isomerizing comprising passing a mixture of hydrogen and pentane over Pd exchanged mordenite at a temperature between 450° F. and 550° F., characterized in that said mordenite contain less than 0.2% by weight exchanged sodium, has a silica to alumina ratio of between 10 and 17, contains from 0.38 to 0.8 milliequivalents per gram of acid sites stronger than 48% aqueous sulfuric acid.
Claim 2
Independent Claim
66 words
A method of isomerizing comprising passing a mixture of hydrogen and pentane over Pd exchanged mordenite at a temperature between 450° F. and 550° F., characterized in that said mordenite contain less than 0.2% by weight exchanged sodium, has a silica to alumina ratio of between 10 and 17, contains from 0.38 to 0.8 milliequivalents per gram of acid sites stronger than 48% aqueous sulfuric acid.
References Cited (Backward Citations)
US3190939A
Cited
US3507931A
Cited
US3574092A
Cited
US3932554A
Cited
US3836597A
Cited
US3842114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |